<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>自定义js框架</title>
    <script src="js/itcast.js"></script>
</head>
<body>
    <div id="div01">div1...</div>
    <div id="div02">div2...</div>

    <script>

        alert(get("div01").innerText);
        alert(get("div02").innerText);


    </script>

</body>
</html>